Fugro completes site investigations for TenneT’s offshore grid connection projects

The LanWin2 cable route required a range of onshore and nearshore investigation activities to support project development. Fugro’s new GroundIQ® service enabled low-impact geophysical surveys, including electrical resistivity profiling and patented 3D ambient noise tomography, a technique that uses naturally occurring vibrations to map subsurface conditions without intrusive methods. The geotechnical phase involved borehole drilling and cone penetration testing (CPT) at 15 locations, including four in nearshore intertidal zones. Fugro’s ARAN® 250 jack-up platform was specially configured for shallow operations, reducing seabed disturbance and minimising environmental impact in these sensitive areas.

At sea, Fugro deployed four specialist survey vessels to meet TenneT Germany’s need for detailed engineering data to guide cable routing and installation. The Fugro Frontier, Fugro Pioneer, and Scotia conducted geophysical, unexploded ordnance, and electromagnetic crossing surveys for both LanWin1 and LanWin2. Shallow geotechnical investigations were carried out by the Fugro Resolve using Blue Snake®, Fugro’s innovative geotechnical system that integrates CPT and sampling technology to acquire high-quality data safely and efficiently in a single deployment.

The Geo-data from the land, nearshore and offshore investigations will be delivered to TenneT Germany through Virgeo®, Fugro’s secure cloud-based platform. These findings will provide insights to guide cable design, routing, and installation planning, helping ensure the long-term reliability and environmental integrity of the grid connection infrastructure.

“Contributing to a project of this scale allows us to demonstrate how high-quality Geo-data can drive smarter, more sustainable infrastructure decisions,” said Jaco Stemmet, Fugro’s Regional Business Line Director for Land. “Our integrated site investigation approach, combining land and marine expertise with environmentally sensitive operations, will help support the successful delivery of LanWin1 and LanWin2 and contribute to Europe’s sustainable energy future.”

This contract builds on Fugro’s long-standing relationship with TenneT Germany and reinforces its commitment to enabling the development of sustainable energy infrastructure across Europe.